Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S
The AirTAC Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S is a genuine double-acting ISO 15552 profile-barrel air cylinder with a Ø100mm bore and 250mm stroke, G1/2 air ports and adjustable end cushioning. Its standardized mounting interface makes it a drop-in replacement for other ISO 15552 cylinders in automation lines.
- BoreØ100 mm
- Stroke250 mm
- Port sizeG1/2
- Acting typeDouble acting
- Rod threadM20×1.5
- CushionAdjustable, 36 mm
About the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S
The AirTAC SAIJ100X250-40-S is a double-acting ISO 15552 profile cylinder equipped with a rear stroke adjuster, delivering 3927N of push force at 0.5MPa. Its 250mm nominal stroke can be dialed back by up to 40mm, creating a precise 210-250mm usable travel window for product changeovers. The extruded aluminum barrel includes sensor grooves on both sides for flexible mounting.
This configuration features a SUS304 stainless steel rod for superior corrosion resistance and carries a G1/2 port. The rear adjustment screw acts purely as a mechanical stop to fine-tune the end position, meaning it does not hold the load without live air pressure. For position holding, an external rod lock or SAIL cylinder is required.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S Technical Specifications
| Model | Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S |
|---|---|
| Series | SAI ISO 15552 profile cylinder |
| Bore size | Ø100 mm |
| Stroke | 250 mm |
| Acting type | Double acting |
| Port size | G1/2 |
| Rod thread | M20×1.5 |
| Fluid | Air (filtered by 40µm element) |
|---|---|
| Operating pressure | 0.15 – 1.0 MPa |
| Proof pressure | 1.5 MPa |
| Temperature | -20 to +70 °C |
| Speed range | 30 – 800 mm/s |
| Cushion | Adjustable, 36 mm |
| Max stroke | Up to 1500 mm |
Specifications follow the official AirTAC SAI series datasheet and ISO 15552 dimensions. Confirm against the product label before installation. Port options: G (BSPP) / NPT.
Theoretical Output Force (Ø100mm)
| Pressure | Push force | Pull force |
|---|---|---|
| 0.5 MPa | 3927 N | 3682 N |
| 0.7 MPa | 5498 N | — |
| Max (@1.0 MPa) | 801 kgf | |
Actual usable force is lower than theoretical due to friction and back-pressure. Size with a safety margin.
Model Code: Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S
| SAI | ISO 15552 profile-barrel cylinder series. |
|---|---|
| 100 | Bore size in mm. |
| ×250 | Stroke length in mm. |
| -S | Optional built-in magnet for sensor position sensing. |
Related SAI-family variants: SAID (double rod), SAIJ (adjustable stroke), SAIL (with lock), SAIF (with valve), BSAI (enclasp / clamp-lock), and SAI-S with built-in magnet. Rod material: carbon steel (blank) / SUS420J2 (A) / SUS304 (B); seals: TPU (blank) / Viton H / NBR N.
Where the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S Is Used
Product Size Changeovers
Dial in the 210-250mm travel window during line changeovers to accommodate different packaging lengths without mechanical rebuilds.
End-Position Tuning
Fine-tune the retract stop during machine commissioning to dial out mechanical variance and achieve exact positioning.
Heavy Forming Operations
Leverage the 3927N push force at 0.5MPa for pressing or heavy lifting tasks where a fixed stroke might over-travel.
Is the Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S the Right Cylinder?
Choose this 100mm bore when a 50mm bore (982N push at 0.5MPa) lacks thrust but an 80mm bore (2513N) is still too small for heavy positioning tasks. The adjustable 210-250mm window is ideal for machines that run multiple product sizes, allowing you to shift the retract end-stop at commissioning without swapping the cylinder. An SAI fixed-stroke cylinder is better if your travel never changes.
This -S variant includes a magnet for CMSE reed and DMSE electronic sensors. It uses PT tapered ports and supports Basic, FA, LB, TC, FTC, TCM1, and TCM2 mounts. Because the 250mm stroke is substantial, ensure external guides support the load to prevent excessive side-loading on the SUS304 rod. To replace an ISO 15552 cylinder, match the 100mm bore, 250mm stroke, 40mm adjust, G1/2 port, and mounting hardware.
Quick checklist
- ✓ Required force at your working pressure
- ✓ Stroke and mounting space
- ✓ Port/thread type (PT/NPT/G)
- ✓ Magnet (-S) for sensors?
- ✓ Side load — consider a guided cylinder
Installation & Maintenance Notes
- check Use clean air filtered to 40µm or finer.
- check Keep within 0.15 – 1.0 MPa operating pressure.
- check Avoid side load on the piston rod.
- check Adjust end cushion screws for smooth stops.
- check Use correct mounting accessory (FA/FB/CA/CB/LB/TC).
- check Installation by qualified personnel per AirTAC docs.
Airtac SAIJ100 Adjustable Cylinder SAIJ100BX250-40S FAQ
At 0.5MPa it provides 3927N of push force and 3681N of pull force. At 0.7MPa the push force increases to 5497N.
The rear adjuster screw lets you shorten the 250mm nominal stroke by up to 40mm, providing a usable travel range of 210-250mm. It functions as a stop, not a lock, and requires live air to hold the load.
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